While Marvelâ€™s Thor is better known for coming from Asgard to his excursions on Earth in contemporary media, Tales of Asgard acts as more like a prequel. Set in other realms aside from Earth, the animated movie focuses on Thor as a teen, approaching adulthood, and beginning to learn the hard lessons necessitated as the son of Odin.

Coddled and shielded by Odin from the realms beyond Asgard, young Thor is hungry for adventure â€“ having a high opinion of his own skills than they actually are. Requesting the assistance of his brother Loki, the pair creep onto the ship of the Warriors Three â€“ in quest of the Lost Flaming Sword of Surtur, believed hidden in the realm of the Frost Giants of Jotunheim.

But the perils of the expedition are immense, and while the Frost Giants are caused to seek war against Asgard because of Thorâ€™s actions, another sinister menace threatens the realm of Odin â€“ and it comes from within their own bordersâ€¦